If there is anything that is an absolute in waterfowling, it is that there are no absolutes! By that I mean on any given day, the birds may want a lot of calling, or very little, but I would never generalize it to a time of year or part of the season. We have had days where the birds wanted screamed at all the way in, and the very next day under the same conditions, we just got their attention then shut up. Reading birds is the key here. Seeing their reaction to the different sounds you make and go with what they like.
You are quite welcome Robert. I know it sounds simple, but there is no substitute for time in the field calling birds. Watching their reactions to various sounds, (honks, clucks, moans, etc.) will tell you what the like and don't like. The more experience, the better you will read birds.
i would add that if something isn't working dont be afraid to try something new. if you have a new sound you have been working on throw it out there it might be the difference. geese get used to hearing the same sounds from hunters. if you are hunting the same area change things up some.
Well on the closing day of the season we shot our limit of geese without one decoy and we were a few miles off the "X". Calling can do a number on geese but it's not always how good the call sounds it's reading the birds. So no calling won't flare geese any time but bad calling or over calling or not paying attention to what the geese are doing will flare geese even durring the early season. Listen to live geese they will help you with the sounds they hear every day.
Sometimes a change in call can make the difference. They might like a high pitch for two weeks and then a deep call the next day. Mix in some other waterfowl sounds as well for confidence (if you have ducks in the area). It'll make the geese feel more at ease.